JP3142226B2 - Combine lift controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mowing frame supported on a traveling body so as to be able to move up and down, a first mowing device attached to a front end of the mowing frame, and a lower end of the mowing frame behind the first mowing device. A second mowing device attached to the mowing frame so as to be able to move up and down in an action posture protruding downward and a storage posture retreating upward,
A first drive mechanism for raising and lowering the cutting frame with respect to the traveling body; and a control means for operating a second drive mechanism for raising and lowering the second cutting device with respect to the cutting frame. First raising / lowering command means for giving a command for raising / lowering to the control means, first height detecting means for detecting the vertical height of the first reaper with respect to the traveling body, and the second reaper. A second height detecting means for detecting an elevation height with respect to the mowing frame, wherein the control means, when an instruction is given by the first elevation instruction means, while the instruction is being given, the first drive Automatically operating the mechanism,
When the height detected by the height detecting means is within the set range, the second mowing device is set at a constant or substantially constant ground height regardless of a change in the detection result obtained by the first height detecting means. The second drive mechanism is automatically operated based on information from the first height detection means and the second height detection means, and the detection height by the first height detection means moves up and down the set range. Deviates from the first height detecting means and the second height detecting means based on information from the first height detecting means and the second height detecting means to bring the second mowing device into the storage posture.
The present invention relates to a combine elevating control device configured to automatically operate a drive mechanism.

[0002]

2. Description of the Related Art When harvesting rice or wheat, the above-mentioned combine is not limited to the case where threshing is performed by supplying not only the tip side of the cut stem but also the whole to a handling room, In both cases of short stem culm and long stem culm, it is possible to harvest while shortening the length of the stump remaining in the field and avoiding the occurrence of poor threshing. That is, in the case of a short culm, the cutting frame is lowered and the first cutting device is positioned near the ground, and only the root side of the planted stem culm is cut by the first cutting device. That is,
Perform one-stage mowing. Then, the length of the stump becomes short to cut the root of the planted stem. Even if the whole of the stalk culm is supplied to the handling room, since the culm length is short, the threshing processed material existing in the handling room becomes an appropriate amount, and the handling action by the handling cylinder easily spreads to the grain and the processing is performed. The threshing action by the intermeshing of the objects is obtained appropriately. In the case of a long culm, the cutting frame is raised and the second reaping device is positioned closer to the ground, and the first reaping device is positioned higher than the second reaping device. , And the stock side is cut by the second reaper. That is, two-stage mowing is performed. Then, the length of the stump becomes short to cut the root of the planted stem. Then, the amount of thresh-processed material in the handling room becomes smaller than when only the tip side cut by the second mowing device is supplied to the handling room, and only the stock side is cut and the whole is supplied to the handling room. The handling effect of the torso can be sufficiently applied to the grains. Furthermore, when performing two-stage mowing, the culm height of the planted stem culm changes, etc.,
Even if the height of the first mowing device is adjusted by raising and lowering the mowing frame, as long as the mowing frame is adjusted within the set range necessary for the two-stage mowing, the second mowing device is automatically controlled by the control means. The mowing device is automatically raised or lowered with respect to the mowing frame so that the ground height of the mowing device is constant or substantially constant, and the length of the stump is constant or substantially constant. Then, in the case of performing one-stage mowing, when the first mowing device is positioned close to the ground by lowering the mowing frame, the mowing frame descends out of the set range for two-stage mowing. The second mowing device is automatically raised and stored so as not to touch the ground. Further, in the case of performing a body turning in the vicinity of a ridge, for example, when the cutting frame is lifted to raise the first cutting device so as not to touch the ground, the cutting frame rises out of the set range for two-stage cutting, The control means automatically raises and stores the second reaper. In this kind of combine,
Conventionally, when the body turns around a ridge, the first raising / lowering instruction means is operated to give an ascending instruction to the control means, and when the mowing device rises and reaches a desired turning level, the operation of the first raising / lowering instruction means is performed. By releasing the lifting command, the mowing device is raised to a desired turning level and the aircraft is turned. When the turning of the aircraft is completed, the first lifting / lowering command means is operated to give a descending command to the control means. When the mowing device descends and reaches a desired work level, the operation of the first raising / lowering command means is released to release the application of the descending command, so that the mowing device is returned to the working level and the work has been started. .

[0003]

Conventionally, when raising a mowing device to a non-working level or lowering the mowing device to a working level by turning the airframe, it is determined whether the mowing device has reached a target level. Need to do
Since it is necessary to continue operating the command means until the target level is reached, it is time-consuming. SUMMARY OF THE INVENTION It is an object of the present invention to enable a mowing device to be easily raised to a predetermined non-working level with high accuracy and easily lowered to a predetermined working level.

[0004]

According to the first aspect of the present invention,
In order to achieve the object, in the apparatus described at the beginning, there is provided second raising / lowering command means for giving a lifting / lowering command to the control means by being manually operated, and the control means is controlled by the second lifting / lowering command means. When a command is given, the first drive mechanism is automatically operated until the height detected by the first height detection means deviates from the set range upward,
And, when a descent command is given by the second lifting / lowering command means, the first drive mechanism is automatically operated until the height detected by the first height detection device falls within the set range. There is a feature.

The operation of the invention according to claim 1 is as follows. Once an ascending command is given by operating the second ascending / descending commanding means, the height detected by the first height detecting means becomes higher than the set range set for two-stage cutting, and the first mowing device The control means performs the raising operation of the cutting frame until the level of the mowing frame is increased to the level for non-working. At this time, since the first mowing device rises out of the set range for the two-stage mowing, the control means automatically raises the second mowing device based on information from the first and second height detecting means. Store. Thereafter, when a lowering command is given once by operating the second ascent / descent command means, the height detected by the first height detecting means becomes the setting range for the two-stage mowing, and the first mowing device operates for the two-stage mowing. The control means performs the lowering operation of the cutting frame until the use level is reached. At this time, since the first mowing device is in the set range for two-stage mowing, the control means automatically sets the second mowing device to the working posture based on information from the first and second height detecting means.

The effects of the invention according to claim 1 are as follows. The first mowing device is placed in the retracted position when the first mowing device is at the non-working up level, or the second mowing device is operated at the first mowing device at the working down level only by giving the ascending command or the down command once. The reaper can be easily lifted to a predetermined non-working level with high precision by simply operating the second lifting / lowering command means once, or can be returned to the working level for two-step mowing with high precision, since the posture is changed. Work has become easier and more efficient in terms of aircraft turning.

According to a second aspect of the present invention, there is provided first stop command means for giving a control stop command to the control means by manual operation, wherein the control means issues a control stop command by the first stop command means. Is given, the automatic operation of the second drive mechanism based on the information from the first height detection means and the second height detection means is stopped, and a control stop command is given by the first stop command means. When the ascending command is given by the second ascending / descending command means, the first drive mechanism is automatically operated until the height detected by the first height detecting means deviates upward from the set range. And, when a lowering command is given by the second raising / lowering commanding means, the first drive mechanism is automatically operated so that the first reaper is moved to a lowering position where the root of the planted stem is cut. Characterized in that are configured to so that.

The operation of the invention according to claim 2 is as follows. In the case of performing one-stage cutting, the automatic control of the second mowing device is turned off by operating the first stop command means, and once the ascending command is given by operating the second elevating command means, the detected height by the first height detecting means is obtained. The control means performs the raising operation of the mowing frame until the height of the mowing frame becomes higher than the set range for two-stage mowing and the first mowing device is raised to the non-working level. Thereafter, once a lowering command is given by the operation of the second lifting / lowering commanding means, the control means performs the lowering operation of the cutting frame until the first reaper lowers to the work level of the single-stage cutting.

The effects of the invention according to claim 2 are as follows. When a single-stage mowing is performed, the first mowing device may be at a non-working up level or the first mowing device may be at a working down level only by giving an ascending command or a descending command once. By simply operating the command means once, the reaper can be easily lifted to the non-working level with high accuracy or returned to the working level with high precision, so that the work can be performed easily and efficiently from the aspect of turning the machine.

The invention according to claim 3 is a third height detecting means for detecting a ground height of the first mowing device, and a second stop command for giving a control stop command to the control means by manual operation. Means, the control means, when a control stop command is given by the first stop command means, in order to maintain the first mowing device in a lowered position to cut the root of the planted stem culm, The first drive mechanism is automatically operated based on information from the third height detecting means, and when a control stop command is given by the first stop command means and the second stop command means, When a lift command is given by the second lift command means, the first
Automatically operating the first drive mechanism until the height detected by the height detection means deviates upward from the set range; and
When a descending command is given by the second ascending / descending command means, the first drive mechanism is automatically operated so that the first mowing device is moved to a descending position at which the root of the planted stem is cut. It is characterized by having been constituted.

The operation of the invention according to claim 3 is as follows. When the single-stage mowing is performed, even if the traveling machine body pitches or climbs on a convex portion, the control means automatically raises and lowers the mowing frame based on information from the third height detecting means. The first mowing device is maintained in a predetermined working position. When this automatic control is turned off by the second stop command means and an ascending command is given once by operating the second elevating command means, the detected height by the first height detecting means is higher than the set range for the two-stage mowing. The control means performs the raising operation of the mowing frame until the height reaches the first mowing device to the non-working level. Thereafter, if a lowering command is given once by operating the second raising / lowering commanding means, the control means performs the lowering operation of the cutting frame until the first reaper lowers to the work level of the single-stage cutting.

The effects of the invention according to claim 3 are as follows. When performing one-stage mowing, the first mowing device can be automatically maintained at the operation position regardless of the pitching of the traveling machine body, so that a high-quality work in which the stump heights are accurately aligned can be performed. Also in this case, the automatic control is turned off, and the first mowing device is set to the non-working raising level only by giving the raising command or the lowering command once, or the first mowing device is set to the working lowering level. By simply operating the second elevating and lowering command means once, the reaper can be easily lifted to the non-working level with high precision or returned to the working level with high precision, thereby making it easier and more efficient to turn the machine. Now you can work.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a self-propelled traveling machine having a crawler-type traveling device 1 and an operating cabin 2 is provided with a threshing device 3, and grains for storing threshing grains from the threshing device 3. A cutting pretreatment device A, which includes a grain tank 4 for cutting planted stem culm such as rice and wheat, and supplying the cut stem culm to the threshing device 3, is connected to a front portion of the traveling machine so as to be able to move up and down freely. , The power is transmitted from the traveling body to the pre-cutting device A to constitute a combine.

The pre-cutting device A is connected to the front part of the threshing device 3 so as to be able to swing up and down around the axis X in the horizontal direction of the traveling body, so that it can swing around the axis X with respect to the traveling body. At the front end of the cutting frame 5 configured to move up and down, a weeding body 6 and a clipper-type first cutting device 7 are provided.
And a rotatable reel 9 is rotatably mounted on a support arm 8 extending from the mowing frame 5, and at a position between the first mowing device 7 and the threshing device 3 of the mowing frame 5, in a longitudinal direction of the machine. The first arranged to line up
The conveyor 10, the auger 11, and the second conveyor 12 are internally provided. The weeding body 6 divides the planted stem culm into a culm to be cut and a non-cutting culm. Then, the first conveyer 10 transports the stalk culm from the first reaper 7 to the rear side of the fuselage, and the auger 11 transfers the stalk culm from the first conveyer 10 to the central portion in the lateral direction of the mowing frame 5. The second conveyor 12 is configured to convey the cut stem from the auger 11 along the conveyance path formed by the cutting frame 5 to the rear of the machine and supply the cut stem to the handling room 3A of the threshing device 3. It is. Thus, when the planting stem culm is cut by the first cutting device 7, the pre-cutting treatment device A supplies the entire front end portion and the culm side portion of the cut stem culm to the handling room 3A.

The threshing device 3 is provided with a handling drum 3a, which is constructed so as to be rotatably driven around an axis in the longitudinal direction of the machine, in the handling room 3A.
A threshing process is carried out while transporting the whole of the front part and the culm side part of the cutting stem culm thrown into A to the rear of the machine body by a rotating handling cylinder 3a, and the threshing product is received through a net 3b. It is configured to be dropped and supplied to a sorting unit located below 3A, and to be sorted into grains and dust by a swing sorting device 3c and a sorting wind from Karamin (not shown).

As shown in FIG. 1, the first mowing device 7
The clipping pre-processing device A is provided with a clipper-type second mowing device 13 which is disposed on the rear side of the fuselage and attached to the lower portion of the mowing frame 5. As shown in FIG.
A support frame 14, which connects the mowing device 13 to the mowing frame 5, is connected to a support portion 5a, which is a bracket of the mowing frame 5, so as to rotate around an axis P1 in the lateral direction of the machine body. An electric motor 17 having a pinion gear 17a meshed with a rack gear portion 16a on the upper end side of the operation rod 16 as an output gear is attached to the cutting frame 5 while the lower end of the operation rod 16 is locked at the intermediate portion. The electric motor 17 is a motor that can be driven forward and reverse, and when the electric motor 17 is driven in the forward or reverse rotation direction, the motor 17 raises the operation rod 16 with respect to the cutting frame 5 by the rotating pinion gear 17a. Or press down. When the operation rod 16 is lifted,
By raising the support frame 14 about the axis P1, the second mowing device 13 is raised behind the auger interior portion of the mowing frame 5 as shown by the phantom line, and the stem after the first mowing device 3 has passed. Make the retracted posture that does not cut the culm. When the operating rod 16 is pushed down, the first cutting device 3 of the cutting frame 5 is positioned as shown by a solid line in the second cutting device 13 by swinging the support frame 14 down around the axis P1 by its own weight. It protrudes below the lowermost point in the vicinity, and assumes an action posture in which the first reaping device 3 has a cutting action on the stem after passing. That is, the second mowing device 13 can be switched by the electric motor 17 between the operating position and the retracted position.

Since the second mowing device 13 is rotatably supported by the support frame 14 by a rotating support shaft 13a which rotates integrally with the second mowing device 13, the angle of attachment of the second mowing device 13 to the support frame 14 can be changed. I can do it. A swing link 19 that is connected to the rotary support shaft 13a so as to rotate integrally, a swing link 20 that is swingably supported at an intermediate portion of the support frame 14 via a rotary support shaft 15a, and this swing link. 20 and the swing link 19
Link 21 linked so as to interlock with the pivot link 1 linked so as to rotate integrally with the rotation support shaft 15a.
5. The second mowing is performed by each of the connecting rods 18 which are connected to the swing link 15 and the supporting portion 5a of the mowing frame 5 and are configured to rotate around the axis P2 with respect to the supporting portion 5a. A link mechanism for changing the mounting angle of the device 13 is configured. That is, when the second mowing device 13 is raised and stored, the support shaft 14 is raised and oscillated, so that the rotation support shaft 15a is
It rises around 1. Thereby, the connecting rod 18
Pushes down the swing link 15 with respect to the support frame 14 around the axis of the rotary support shaft 15a using the support portion 5a as a reaction force member. Then, the oscillating link 20 oscillating together with the oscillating link 15 becomes the oscillating link 1 via the interlocking link 21.
9 by pulling up the second mowing device 13
Is set to a downward angle with respect to the support frame 14. On the other hand, when the second mowing device 13 is lowered to the working posture, the support frame 14 is lowered and oscillated, so that the rotary support shaft 15a is lowered around the shaft center P1. Thus, the connecting rod 18 raises the swing link 15 with respect to the support frame 14 around the axis of the rotation support shaft 15a using the support portion 5a as a reaction force member. Then, the swing link 20 that swings together with the swing link 15 becomes the link 2
By pushing down the swing link 19 via the first bracket 1, the mounting angle of the second mowing device 13 with respect to the support frame 14 is set to the upward angle. That is, the second reaping device 1
When the storage position 3 is in the retracted position, the mounting position is lower than in the operating position. For this reason, the second mowing device 13 is in a posture along the auger interior portion of the mowing frame 5, and the empty space below the mowing frame 5 is effectively used as a storage space, so that the second mowing device 13 can be stored. .

As shown in FIG. 1, when the rotation operating portion of the first potentiometer 23 supported by the threshing device 3 is interlocked with the cutting frame 5 by the interlocking arm 24, the cutting frame 5 swings up and down. Then, the first potentiometer 23 is operated. That is, the first mowing device 7 is configured to be moved up and down with respect to the traveling machine body by the lift cylinder 22,
The first potentiometer 23 is used as a first height detecting means 23 for detecting the height of the first mowing device 7 with respect to the traveling machine body.
It is.

As shown in FIG. 2, a second potentiometer 25 is supported by the support 5a of the cutting frame 5,
An operation arm 25a extending from the rotary operation unit of the second potentiometer 25 is connected to the support frame 14 by an interlocking link 26, and when the support frame 14 swings up and down with respect to the cutting frame 5, the operation arm 25a interlocks with this. The operation arm 25a is configured to be swingably operated,
The second potentiometer 25 is connected to the electric motor 17.
The lifting operation with respect to the mowing frame 5 by the second
The second height detecting means 25 detects the elevation of the mowing device 13 with respect to the mowing frame 5.

As shown in FIG. 1, a sensor plate 27 is provided below the cutting frame 5.
Is mounted so as to swing up and down around a horizontal axis 27a located at the front end side of the body. As shown in FIG. 3, the sensor plate 27 is configured to contact the upper end of the stump after the first mowing device 7 has passed to detect the height of the first mowing device 7 with respect to the ground. 27 is detected by the sensor plate 2
The rotary operation-type potentiometer 27c supported by the mowing frame 5 in a state interlocked with the vertical swinging of the motor 7 extracts electric signals. That is, the sensor plate 27a and the potentiometer 27c
, The third height of the ground of the first mowing device 7 is detected.
The height detecting means 27 is constituted.

As shown in FIG. 5, the operating lever 28a for steering the fuselage provided inside the driving cabin 2 is moved in the longitudinal direction of the fuselage in addition to the lateral direction of the fuselage for swinging for the steering operation of the fuselage. When the operating lever 28a is operated to swing from the neutral position in the front-rear direction of the traveling body, the up switch 28b can be operated or the down switch 28c can be operated. Can be operated, and an operation lever 28a and both switches 28b and 28c constitute a first elevating and lowering instruction means 28.

As shown in FIG. 5, both switches 28b and 28c of the first up / down
a second lifting / lowering command means 29 attached to the grip portion of
A first stop commanding means 30 comprising a height detecting means 23, the second height detecting means 25, a changeover switch 30, a cutting height setting device 31, a third height detecting means 27, and a second comprising a changeover switch 32. Each of the stop command means 32 is linked to a control means 33, and the control means 33 is linked to an electromagnetic control valve 34 of the lift cylinder 22 and a drive circuit 35 of the electric motor 17. The control means 33 is composed of a microcomputer, and is configured to automatically operate based on the control flow shown in FIGS. 6, 7, and 8.

That is, as shown in FIG. 6, when the operation lever 28a is swung from the neutral position to the front side of the fuselage to turn on the up switch 28b, the up switch 2b is turned on.
8b gives an ascending command to the control means 33. Then, the control unit 33 determines whether or not the mowing frame 5 is at the ascending limit based on the information from the first height detecting unit 23,
If it is determined that the first cutting device 7 is in the ascending limit, the electromagnetic control valve 34 is operated to the neutral position, the lift cylinder 22 is not driven, and the cutting frame 5 is not lifted.
At the ascending limit. When it is determined that the mowing frame 5 is not at the ascending limit, the electromagnetic control valve 34 is switched to the ascending side to operate the lift cylinder 22, and the mowing frame 5 is operated to raise the first mowing device 7. Manipulate. This ascending operation is continuously performed while the ascending switch 28b is operated to give an ascending command.
When the operation lever 28a is swung from the neutral position to the rear side of the fuselage and the lowering switch 28c is turned on, the lowering switch 28c gives a lowering command to the control means 33. Then, the control means 33 determines whether or not the mowing frame 5 is at the lower limit based on the information from the first height detecting means 23, and if it determines that the mowing frame 5 is at the lower limit, the electromagnetic control valve 34 Is operated neutral to drive the lift cylinder 22, and the first mowing device 7 is positioned at the lower limit without performing the lowering operation of the mowing frame 5. Mowing frame 5
Is determined to be not at the lowering limit, the electromagnetic control valve 34 is switched to the lowering side to operate the lift cylinder 22, the lowering operation of the mowing frame 5 is performed, and the first mowing device 7 is lowered. This lowering operation is performed by the lowering switch 2
The operation is continuously performed while 8c is operated to enter the down command.

As shown in FIG. 7, the first stop command means 30
Is operated on the entry side to give a control stop command from the first stop command means 30 to the control means 33. Then, the control means 33
Outputs a storage signal to the drive circuit 35 to operate the electric motor 17 to the storage side, and to bring the second mowing device 13 into the storage posture. By operating the first stop command means 30 to the cutting side,
The application of the control stop command from the stop command means 30 to the control means 33 is released. Then, the control unit 30 determines whether the height detected by the first height detection unit 23 is within a set range preset for two-stage mowing or deviates from this set range. The control means 33, which has determined that the detection height by the first height detection means 23 is within the set range, determines whether the first cutting device 7 has the minimum height H1 and the maximum height H2 for two-stage cutting shown in FIG. It is determined that it is located between. In this case, the control unit 33 automatically operates the electric motor 17 based on information from both the first height detection unit 23 and the second height detection unit 25, and performs the detection by the first height detection unit 23. Even if the height changes, the ground height H3 of the second mowing device 13 is made constant or almost constant. That is, the ground height of the first mowing device 7 is set to the minimum height H1 and the maximum height H2.
The height of the second mowing device 13 relative to the cutting frame 5 is automatically adjusted so that the ground height H3 of the second mowing device 13 is constant or substantially constant. Further, when the first mowing device 7 is positioned at the two-stage mowing level shown in FIG. 4, the control means 33 transmits the information from the mowing height setting device 31 and the first height detecting means 2
3, the height detected by the first height detecting means 23 is equal to or equal to the set ground height set by the cutting height setting device 31 as the position to be positioned for two-stage cutting. The cutting frame 5 is automatically moved up and down so as to be substantially equal. And the cutting height setting device 3
Even if the user operates 1 to change the ground height at which the first mowing device 7 is to be positioned, it is possible to perform two-stage mowing while keeping the stump height constant or almost constant. When the control means 33 determines that the height detected by the first height detecting means 23 deviates from the set range to the upper side or the lower side, the first mowing device 7 determines that the first height is lower than the minimum height H1 by one step. It is determined that it is located at the mowing level or that it is located at the non-working level higher than the maximum height H2. In this case, the control means 33 automatically operates the electric motor 17 to the storage side to bring the second reaper 13 into the storage position.

By operating the second stop command means 32 to the cutting side, the application of the control stop command from the second stop command means 32 to the control means 33 is released. Then, the control means 33 sets the third
Based on information from the potentiometer 27c of the height detecting means 27, the lift cylinder 2 is controlled so that the height detected by the potentiometer 27c is constant or almost constant.
2 is automatically operated to move the cutting frame 5 up and down with respect to the traveling machine body. That is, even if the traveling body leans back and forth or climbs on a protrusion, the ground height of the first reaper 7 is kept constant or almost constant, and the height of the stump is kept constant or almost constant. It is possible to cut one step while maintaining. The second stop command means 32 is operated on the entry side, and a control stop command is given from the second stop command means 32 to the control means 33. Then, the control means 33 stops the raising / lowering operation of the cutting frame 5 based on the information from the potentiometer 27c of the third height detecting means 27. Thereby, when performing the one-stage mowing, it is possible to lower the mowing frame 5 by turning on the lowering switch 28c by the operation lever 28a and adjust the ground height of the first mowing device 7 to an arbitrary height. .

The second raising / lowering command means 29 is constituted by a push button switch. By repeatedly performing a pressing operation, a first operation for giving a raising command to the control means 33 and a second operation for giving a lowering command to the control means 33 are provided. Are performed alternately and repeatedly. As shown in FIG. 8, when the second lifting / lowering command means 29 is operated to give a lifting command from the second lifting / lowering command means 29 to the control means 33, the lifting / lowering control means 29
The first mowing device 7 is raised to the limit by raising the mowing frame 5 to the raising limit. Second lift command means 29
By operating the second up / down command means 29 to the control means 33
, A raising / lowering control means 29 determines whether or not a stop command is given from the first stop command means 29. If it is determined that the stop command has not been given from the first stop command means 29, the elevation control means 29 sets the height detected by the first height detection means 23 in advance in the set range for the two-stage mowing. Then, the mowing frame 5 is lowered to a specific detection height to lower the first mowing device 7 to a specific work level for two-stage mowing. When determining that a stop command is given from the first stop command unit 29, the control unit 33 further determines whether or not a stop command is given from the second stop command unit 32. When it is determined that the stop command has not been given from the second stop command unit 32, the control unit 33 lowers the cutting frame 5 by lowering the cutting frame 5 based on the height detected by the third height detecting unit 27. Then, the first mowing device 7 is lowered until the height detected by the third height detecting means 27 becomes the detected height for one-stage cutting control. Second stop command means 32
When it is determined that the stop command is given from the controller, the control means 33 lowers the cutting frame 5 to a preset specific one-stage cutting height, and moves the first cutting device 7 to a specific one near the ground. Lower to the level for one-step mowing.

That is, as shown in FIG. 4, when the stem of the stem to be harvested is long, the raising switch 28b or the lowering switch 28c is turned on by the operation lever 28a to operate the control means 33 to raise the cutting frame 5. Alternatively, the lowering control is performed, and when the first mowing device 7 reaches the ground height between the minimum height H1 and the maximum height H2 for two-stage mowing, the raising switch 28b or the lowering switch 28c is operated to turn off the control means. The control of raising or lowering the cutting frame 5 by 33 is stopped. At this time, if the first stop command means 30 is turned off so that it does not act, the control means 33
The cutting unit 13 is automatically brought into the use posture, and even if the height of the cutting frame 5 with respect to the traveling machine body changes by changing the height of the first cutting unit 7 with respect to the ground, the control means 3
3 automatically adjusts the height of the second mowing device 13 relative to the mowing frame 5 to maintain the ground height of the second mowing device 13 constant or almost constant. Thereby, the portion of the planted stem culm which is relatively far from the ground is cut by the first cutting device 7 so that the entire cut stem can be supplied to the handling room 3A. The root of the stem after cutting is cut by the second cutting device 13 to perform two-step cutting so as to shorten the length of the stump. further,
Even if the ground height of the first mowing device 7 is changed in accordance with the change in the height of the planted stem culm, the length of the stump can be adjusted without any special operation for adjusting the ground height of the second mowing device 13. Work while maintaining constant or almost constant.

As shown in FIG. 3, when the stem length of the stem to be harvested is short, the lowering switch 28c is turned on by the operating lever 28a to operate the control means 33 to lower the cutting frame 5; When the first mowing device 7 is located near the ground, the lowering switch 28c is operated to be turned off, and the lowering control of the mowing frame 5 by the control means 33 is stopped. At this time, if the first stop command means 30 is turned off so as not to act, the control means 33 automatically sets the second mowing device 13 to the retracted posture so as not to touch the ground. Thereby, the root of the planted stem can be cut by the first cutting device 7, and one-stage cutting can be performed so that the entire cut stem can be supplied to the handling room 3A. At this time, if the second stop command means 32 is turned off so as not to act, the control means 33 controls the height of the cutting frame 5 with respect to the traveling body so that the height detected by the third height detection means 27 becomes constant. Because of the control, even if the traveling body leans back and forth or climbs on a protrusion, the work can be performed while keeping the stump height constant or almost constant.

Regardless of whether the two-stage mowing operation or the single-stage mowing operation is being performed, in turning the body, when the second ascent / descent instruction means 29 is operated to give an ascending instruction to the control means 33, the control means 33 The cutting frame 5 is raised to the limit. For this reason, it is possible to turn while raising the pre-cutting device A so as not to touch the ground. When the turning operation is completed and the second raising / lowering instruction means 29 is operated to give a lowering instruction to the control means 33, when the first stop instruction means 30 is cut off so as not to act, the two-stage mowing work is performed. Therefore, the control means 33 controls the lowering of the mowing frame 5 until the first mowing device 7 reaches the ground height for two-stage mowing located between the minimum height H1 and the maximum height H2.
If the first stop commanding means 30 is operated so that the first stop commanding means 30 is actuated and the second stop commanding means 32 is not actuated so that the first mowing device 7 is automatically lifted and lowered, the single-stage mowing operation is performed. Therefore, the control unit 33 determines that the height detected by the third height detection unit 27 has reached the predetermined detection height, and the elevation control of the mowing frame 5 has been stopped. The lowering control of the mowing frame 5 is performed until one mowing device 7 is formed. Further, when the first stop command means 30 and the second stop command means 32 are cut so as not to act on each other, in the single-stage cutting operation without performing the automatic lifting / lowering control of the first cutting device 7. Because of this, the control unit 33 performs the lowering control of the cutting frame 5 until the first cutting device 7 reaches a specific ground height near the ground for single-stage cutting.

[Another Embodiment] Instead of the lift cylinder 22, an air cylinder, a hydraulic or electric motor, or the like may be adopted and implemented. These are collectively referred to as a first drive mechanism 22. Instead of the electric motor 17, a pneumatic or hydraulic cylinder, a hydraulic motor, or the like may be employed, and these are collectively referred to as a second drive mechanism 17.

As the ascending position when the mowing frame 5 is controlled to ascend based on the ascending command from the second ascending / descending commanding means 29, the ascending limit as in the above-described embodiment is adopted, and the setting range for the two-stage mowing is set higher than the setting range. A specific ascending position set at a position up to the ascending limit at a high level may be adopted and implemented. That is, the mowing pre-processing device A may be set to a position where it can be prevented from coming into contact with the ground when the aircraft turns.

The first mowing device 7 is provided with a memory means for storing the ground height adjusted and set within the range for two-stage mowing. The lowering command means 29 gives a descending command and the first stop command means. When the lowering control of the reaping frame 5 is performed without the operation of the second raising / lowering command means 2,
Before the ascending operation based on the ascending command of No. 9 is performed, the descending control may be performed to the ground height stored by the storage means.

The first mowing device 7 has a storage means for storing the ground height set and adjusted at the time of the first cutting, or the first mowing device 7 stores the average value of all the ground heights adjusted and set at the time of the first cutting. It may be provided with a storage means for calculating and storing the average ground height, and a descent command is given by the second elevating command means 29 and the first stop command means 3
When the lowering control of the mowing frame 5 is performed because the 0 and the second stop command means 32 are not operating, the data is stored by the storage means before the raising operation based on the raising command of the second raising and lowering command means 29 is performed. The control is performed such that the descent control is performed to the ground height or the descent control is performed to the average ground height stored by the storage means before the ascent operation based on the ascent command of the second elevating command means 29 is performed. May be.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings.

[Brief description of the drawings]

FIG. 1 is a side view of the entire combine.

FIG. 2 is a side view of a second mowing device disposition portion.

FIG. 3 is an explanatory diagram of one-stage mowing.

FIG. 4 is an explanatory diagram of two-stage mowing.

FIG. 5 is a block diagram of a control system.

FIG. 6 is a flowchart of control based on a command from a first lifting / lowering command unit.

FIG. 7 is a flowchart of the second mowing device elevating control.

FIG. 8 is a flowchart of control based on a command from a second lifting / lowering command unit.

[Explanation of symbols]

 Reference Signs List 5 cutting frame 7 first cutting device 13 second cutting device 17 second driving mechanism 22 first driving mechanism 23 first height detecting means 25 second height detecting means 27 third height detecting means 28 first ascent / descent command means 29 second up / down command means 30 first stop command means 32 second stop command means 33 control means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A01D 34/24 A01D 34/00 A01D 41/02

Claims (3)

(57) [Claims] 1. A cutting frame (5) supported on a traveling body so as to be able to move up and down, a first cutting device (7) attached to a front end of the cutting frame (5), and a rear side of the first cutting device (7). And a second mowing device (13) attached to the mowing frame (5) so as to be vertically movable in a working posture protruding downward from a lower end of the mowing frame (5) and a retracted posture retreating upward. A first drive mechanism (22) for raising and lowering the (5) with respect to the traveling body, and a second drive mechanism (17) for raising and lowering the second reaping device (13) with respect to the reaping frame (5). ), A first raising / lowering command means (28) for giving a command for raising / lowering to the control means (33) by being manually operated;
First height detecting means (23) for detecting the vertical height of the first mowing device (7) with respect to the traveling body, and detecting the vertical height of the second mowing device (13) with respect to the mowing frame (5). A second height detecting means (25) for performing the first drive while the command is given by the first elevating command means (28). When the mechanism (22) is automatically operated and the detection height by the first height detection means (23) is within a set range, regardless of a change in the detection result by the first height detection means (23) The first height detecting means (23) and the second height detecting means (2) are provided so that the second mowing device (13) has a constant or almost constant ground height.
5) automatically operating the second drive mechanism (17) based on the information from (5), and when the height detected by the first height detection means (23) deviates vertically from the set range, The second drive mechanism (17) based on information from the first height detecting means (23) and the second height detecting means (25) so that the second mowing device (13) is in the storage position. And a second raising / lowering commanding means (29) for giving a lifting / lowering command to the control means (33) by being manually operated. The control means (33) is configured such that, when an elevation command is given by the second elevation command means (29), the height detected by the first height detection means (23) deviates upward from the set range. The first drive mechanism (22) When the automatic operation is performed and a descending command is given by the second ascent / descent command means (29), the first drive is performed until the height detected by the first height detecting device (23) falls within the set range. A combine lift control device configured to automatically operate the mechanism (22). 2. A first stop command means (30) for giving a control stop command to the control means (33) by an artificial operation, wherein the control means (33) comprises: a first stop command means. When a control stop command is given by (30), automatic operation of the second drive mechanism (17) based on information from the first height detection means (22) and the second height detection means (25) is performed. When the control is stopped by the first stop command means (30) and the ascent command is given by the second elevation command means (29), the first height detection means (23) is stopped. When the first drive mechanism (22) is automatically operated until the detected height of the first drive mechanism (22) deviates upward from the set range, and a lowering command is given by the second raising / lowering commanding means (29), 1 Harvester (7 2. The combine lift control device according to claim 1, wherein the first drive mechanism (22) is automatically operated so that the first drive mechanism (22) is moved to a lowered position where the root of the planted stem is cut off. 3. A third height detecting means (27) for detecting a ground height of the first mowing device (7), and gives a control stop command to the control means (33) by being manually operated. A second stop commanding means (32), wherein the control means (33) implants the first mowing device (7) when a control stop command is given by the first stop commanding means (30). The first drive mechanism (22) is automatically operated based on information from the third height detecting means (27) to maintain the descent position at which the stem of the stem and stem is cut off, When a control command is given by the stop command means (30) and the second stop command means (32), and when a lift command is given by the second lift command means (29), the first height detection is performed. The height detected by the means (23) is equal to the set range. The first drive mechanism (22) is automatically operated until the surroundings deviate upward, and when a lowering command is given by the second raising / lowering commanding means (29), the first mowing device (7) is turned off. 3. The combine lift control device according to claim 2, wherein the first drive mechanism (22) is automatically operated so as to be at a lowered position where the root of the planted stem is cut off.